Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2023-25136

OpenSSH server (sshd) 9.1 introduced a double-free vulnerability during options.kex_algorithms handling. This is fixed in OpenSSH 9.2. The double free can be leveraged, by an unauthenticated remote attacker in the default configuration, to jump to any location in the sshd address space. One third-party report states "remote code execution is theoretically possible."

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.5, indicating it can be exploited remotely over the network but requires specific conditions to be met without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts limited integrity, and availability (service disruption) for affected systems. Impacting 9 products from openbsd, from fedoraproject, from netapp and 6 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2023, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2023-02-03T06:15:09.350

Last Modified

2024-11-21T07:49:10.877

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.5 (MEDIUM)

Weaknesses

Type: Primary
CWE-415

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	openbsd	openssh	9.1	Yes
Operating System	fedoraproject	fedora	37	Yes
Operating System	fedoraproject	fedora	38	Yes
Application	netapp	ontap_select_deploy_administration_utility	-	Yes
Operating System	netapp	a250_firmware	-	Yes
Hardware	netapp	a250	-	No
Operating System	netapp	500f_firmware	-	Yes
Hardware	netapp	500f	-	No
Operating System	netapp	c250_firmware	-	Yes
Hardware	netapp	c250	-	No

References

http://www.openwall.com/lists/oss-security/2023/02/13/1 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2023/02/22/1 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2023/02/22/2 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2023/02/23/3 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2023/03/06/1 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2023/03/09/2 Mailing List, Third Party Advisory ([email protected])
https://bugzilla.mindrot.org/show_bug.cgi?id=3522 Exploit, Issue Tracking, Third Party Advisory ([email protected])
https://ftp.openbsd.org/pub/OpenBSD/patches/7.2/common/017_sshd.patch.sig Patch, Vendor Advisory ([email protected])
https://github.com/openssh/openssh-portable/commit/486c4dc3b83b4b67d663fb0fa62bc24138ec3946 Patch, Third Party Advisory ([email protected])
https://jfrog.com/blog/openssh-pre-auth-double-free-cve-2023-25136-writeup-and-proof-of-concept/ Exploit, Third Party Advisory ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JGAUIXJ3TEKCRKVWFQ6GDAGQFTIIGQQP/ ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R7LKQDFZWKYHQ65TBSH2X2HJQ4V2THS3/ ([email protected])
https://news.ycombinator.com/item?id=34711565 Issue Tracking, Third Party Advisory ([email protected])
https://security.gentoo.org/glsa/202307-01 Third Party Advisory ([email protected])
https://security.netapp.com/advisory/ntap-20230309-0003/ Third Party Advisory ([email protected])
https://www.openwall.com/lists/oss-security/2023/02/02/2 Exploit, Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2023/02/13/1 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2023/02/22/1 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2023/02/22/2 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2023/02/23/3 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2023/03/06/1 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2023/03/09/2 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.mindrot.org/show_bug.cgi?id=3522 Exploit, Issue Tracking, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://ftp.openbsd.org/pub/OpenBSD/patches/7.2/common/017_sshd.patch.sig Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/openssh/openssh-portable/commit/486c4dc3b83b4b67d663fb0fa62bc24138ec3946 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://jfrog.com/blog/openssh-pre-auth-double-free-cve-2023-25136-writeup-and-proof-of-concept/ Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JGAUIXJ3TEKCRKVWFQ6GDAGQFTIIGQQP/ (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R7LKQDFZWKYHQ65TBSH2X2HJQ4V2THS3/ (af854a3a-2127-422b-91ae-364da2661108)
https://news.ycombinator.com/item?id=34711565 Issue Tracking, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/202307-01 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20230309-0003/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.openwall.com/lists/oss-security/2023/02/02/2 Exploit, Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For openbsd's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.